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采用FeO/AlO/TiO氧载体提高甲烷化学链燃烧性能

Enhanced performance of chemical looping combustion of methane with FeO/AlO/TiO oxygen carrier.

作者信息

Wu Hsuan-Chih, Ku Young

机构信息

Department of Chemical Engineering, National Taiwan University of Science and Technology Taipei 10607 Taiwan

出版信息

RSC Adv. 2018 Nov 29;8(70):39902-39912. doi: 10.1039/c8ra07863g. eCollection 2018 Nov 28.

DOI:10.1039/c8ra07863g
PMID:35558244
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9091305/
Abstract

Iron-based oxygen carriers supported on alumina or alumina/titania were prepared and evaluated for chemical looping combustion of methane. The reduction conversion of FeO/AlO and FeO/AlO/TiO particles was markedly increased with increasing inlet concentration and was slightly enhanced by elevated operating temperatures. According to the shrinking core model, the mass transfer coefficients ( ) of FeO/AlO and FeO/AlO/TiO reduction with methane are found to be 0.07 and 0.12 mm s. Complete combustion of methane is almost achieved for experiments conducted with FeO/AlO and FeO/AlO/TiO operated as the FeO/CH molar ratio reached about 5.4 and 4.4, respectively. Carbon deposition during methane combustion was avoided by using FeO/AlO/TiO as an oxygen carrier. More heat was generated for the combustion of methane by FeO/AlO/TiO oxygen carriers because methane more fully reacted with the FeO contained in the FeO/AlO/TiO oxygen carriers.

摘要

制备了负载在氧化铝或氧化铝/二氧化钛上的铁基氧载体，并对其用于甲烷化学链燃烧进行了评估。FeO/Al₂O₃和FeO/Al₂O₃/TiO₂颗粒的还原转化率随入口浓度的增加而显著提高，并随操作温度的升高而略有增强。根据缩核模型，发现FeO/Al₂O₃和FeO/Al₂O₃/TiO₂与甲烷还原反应的传质系数（）分别为0.07和0.12 mm/s。当FeO/CH₄摩尔比分别达到约5.4和4.4时，以FeO/Al₂O₃和FeO/Al₂O₃/TiO₂作为氧载体进行的实验几乎实现了甲烷的完全燃烧。通过使用FeO/Al₂O₃/TiO₂作为氧载体避免了甲烷燃烧过程中的积碳。由于甲烷与FeO/Al₂O₃/TiO₂氧载体中所含的FeO更充分地反应，因此FeO/Al₂O₃/TiO₂氧载体燃烧甲烷产生了更多热量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/cb547a9633f7/c8ra07863g-f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/39c58e7c7c9c/c8ra07863g-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/cb547a9633f7/c8ra07863g-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/d9ea1b0d704d/c8ra07863g-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/0e904e55df32/c8ra07863g-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/e08ecb4448f8/c8ra07863g-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/d683a2de00e4/c8ra07863g-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/db3599a19ebe/c8ra07863g-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/bb685dcd2f7c/c8ra07863g-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/e16d0e989429/c8ra07863g-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/39c58e7c7c9c/c8ra07863g-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/beaa0fceacf1/c8ra07863g-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/7a103806e63c/c8ra07863g-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/8f6eb5cb6158/c8ra07863g-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cb2a/9091305/cb547a9633f7/c8ra07863g-f12.jpg

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